I found this vintage handheld Singer Mini machine on Kijiji. It works perfectly well and sews in a beautiful chain stitch : r/sewing

Vintage Singer Sew Handy Model 20 Child's Hand Crank Sewing Machine,VGC Complete

Singer Toy sewing Machine Model 20 in action

Singer Miniature Sewing Machine

Handheld Sewing Machine, Mini Portable Electric Sewing Machine Cordless Sewing Machine for Adult Easy to Use and Fast Stitch Suitable for Clothes Fabrics DIY Home Travel

Antique Miniature Singer Sew-handy Machine, Model 20 Never Used

Singer Mini Vintage Sewing Machine

Vintage Battery Operated Hand Held Sewing Machine / Mini Stapler Sewing Machine / Chain Stitch Sewing / Travel Sewing Machine / Quick Repair

Vintage Battery Operated Hand Held Sewing Machine / Mini Stapler Sewing Machine / Chain Stitch Sewing / Travel Sewing Machine / Quick Repair

Singer Sewhandy 20

Singer Sewing Machine Vintage 6211C Zigzag With Original Box Made in Brazil

Singer Miniature Sewing Machine

Singer Miniature Sewing Machine

Antique Singer Miniature Sewing Machine Gorgeous Singer 10 Simanco 1920s